Merge useful functions from build.sh to mkarchiso

Having a separate build script for each profile is wasteful. It would be better to move the needed functions from build.sh scripts to mkarchiso.

• Move profile-specific settings (iso_name, iso_label, iso_publisher, iso_application, iso_version, etc.) to a new profile definition file (shell script). E.g. profiledef.sh.
• Make both build.sh scripts consistent.
• Merge useful functions from build.sh to mkarchiso. The profile's wanted build steps would be listed in profiledef.sh (in some form) .